Portable drilling-machine



(No'Mod-el.) l G.H.PECK.

PORTABLE DRILLING MACHINE. No. 507,752. Patented Oct. 31, 1893.

If///////////////////////////////////f A Unire STATES lPATENT Ormes.

CAID H. PECK,'OF ELMIRA, NEW YORK.

PORTABLE DRI LLlNG-M-ACHIN E.

SPECIFICATION forming part of Letters Patent N o.. 507,752, datedOctober 31, 1 893. Applcationled October 1, 1892. Serial No. 447,486.(No model.)

To all whom it may concern,.-

Be it known that I, CAID H. PEOK, a citizen of the UnitedStates,residing at Elmira, Chemung county, New York, have inventedcertain new and useful Improvements in Portable Drilling or ReamingMachines; and I do hereby declare that the following is a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to improvements in portable drilling or reamingmachines.

The object of the invention is to provide a power-driven snbstituteforthe ordinary ratchet-drill and thereby lighten the labor and acceleratethe work. My drill is attached to the work in the same way as theratchet drill and will accomplish much more in a given time than suchdrill.

My invention consists essentially in the combination of a main casing, arotary piston within said casing, a drill spindle arranged axiallywithin the piston and reducing gearing between the rotary piston and thespindle, as hereinafter described.

It also consists in other combinations hereinafter described and pointedout in the claims.

In the drawings, Figure 1, representsa vertical central section throughthe machine showing one handle and the drill spindle and drill inelevation. Fig. 2, is a horizontal seotion through the same. Fig. 3, isan elevation of the top cylinder cover. Fig. 4, is a plan of the pistonshowing air or steam pas` sages. Fig. 5, is a side elevation of a gearcarrying frame, and Fig. 6, is a plan of the gears.

A is the cylinder or main casing of the machine.

B is a revolving piston having flanged ends, as shown.

C and D are top and bottom cylinder covers respectively.

E is the gear case handle and nut for the feed screw. This case isconnected with the main cylinder in any suitable way, or as shown in thedrawings.

F is a driving pinion made fast to one end of the piston B.

G G are gears to which are connected the pinions H H, which areintergeared with internal gearI within the gear case E.

J is a gear frame made fast to the upper end of spindle M. The spindle Mpasses down through the center of piston B, forming an arbor aroundwhich said piston revolves and is provided with a chuck or socket forthe drill or reamer.

K and L are arms or handles by which the machine'is moved about. Thesehandles are hollow and serve as conduits for the admission and exhaustof air or steam for operating the rotary piston.

The main cylinder and the piston with their ports and passagesconstitute a rotary engine, which, with the reducing gearing, spindleand bit, constitute an improved portable drilling and. roaming machine.The rotary piston is providedwith movable vanes o o o o, working insuitable recesses in said cylinder, and with passages c c and f fleading from ports a and h in the cylinder covers to spaces k lo in thecylinder behind said vanes. .The vanes o o are provided with passages orchannels d through which the air or steam passes from f to k. The handleK carries an induction valve h adapted to be opened or closed through ascrew connection with the tubular port or support for said handle.

In operation, a flexible pipe or hose is connected with the handle K atj, through which air or steam under suitable pressure is admitted to thecylinder whence it passes by ports a and b in the top and bottom coversto passages c c c c, to the inner edges of vanes o o 0 0, forcing themagainst the inner walls of the cylinder,thence through channels cl tospaces lc lo, causing the piston B and pinion FagorV to revolve, andthen exhausts through c and handle L. The pinions H H carried byintermediate gears G G, mounted in cage J, mesh with the internal gearI, and are revolved around pinion F, in the nature of a planet movement,and as the cage J is madefast to the spindle M, the drill is driventhrough the medium of the piston and the gearing at a speed less thanthat of the piston, whereby the desired motion and power are attained.Compressed air is preferred to steam, because it is cooler.

IOO

Having now described my invention, what I claim is 1. Thecombination ofa main casingorcylinder, a rotary piston within said casing, means forconducting a fluid under pressure to said piston, a drill spindleextending through and forming the arbor around which the piston revolvesand reducing gearing between thepiston and spindle, substantially asdescribed.

2. The combination of a rotary engine, a pair of hollow arms serving asmeans for handling and moving the engine and as an induction pipe to,and as an exhaust from, the engine, a spindle and connecting gearingbetween the engine piston and said spindle, substantially as described.

3. The combination of a rotary engine, a drill spindle extending throughand forming the arbor around which the piston of said engine revolvesand reducing gearing between the engine piston and the spindle,substantially as described.

In testimony whereof Iaix my signature in the presence of two witnesses.

OAID H. PECK.

Vit-nesses:

JAMES M. GULICK, CLARANCE W. PECK.

